Load carrier mounting



LE GRAND H. LULL LOAD CARRIER MOUNTING Jan. 11, 1949.

5 Sheets-Sheet 1 Filed Nov. 9, 1945 FIE 2 Zjvwwwbcw LE GRAND H. LULLJam. 11, 1949.

LE} GRAND H. LULL LOAD CARRIER MOUNTING Filed Nov. 9, 1945 '5Sheets-Sheet? LE GRAND. Luu.

Jan. 11, 1949. LE GRAND H. LULL LOAD CARRIER moum'ine 5 Sheets-Sheet 3Filed Nov. 9, 1945 LE GRAND H. Luu.

as U 24 W W j Patented Jan. 11, 1949 hairs!) STATES PATENT OFFICE r2,458,949 LoAn CARRIER MOUNTING Le omnan-Lnu, Minneapolis, Minn. IApplication November 9, 1945, Serial N6. 627,694 en n's (01. 214-113)This invention relates to improvements in load handling devices orloaders, which are supported on and operated by an automotive vehiclesuch as a tractor. n

The present invention more particularly relates to certain improvementsin the type of loader shown in my co-pending application, Serial No.515,783, filed December 27, 1943, now United States Patent No.2,394,458, issued Feb. 5, 1946. This loader comprises an uprightextensible tower or frame mounted upon a tractor and operated by ahydraulic cylinder, or cylinders, and an arrangement of cables to raiseand lower a carrier member upon which the actual load carrier, such as amaterial bucket or the like is detachably mounted. It is found to bevery desirable to tilt the bucket or other carrier as it is lifted inorder to prevent the material from running out or falling oif and it isin connection with such tilting and associated features that my presentinven- 1 tion is chiefly concerned.

The primary object of the invention is to provide a mechanism by whichthe bucket or load carrier may be-tilted to a degree or anglegreaterthan possible in any previous construction and to such extent that thematerial will not fall out as it is lifted and transported from place toplace. Another object is to provide a bucket tiltingmechanism which iscompletely automatic in its operation, is fully adjustable as requiredboth to initially determine the tilt angle and to maintain it as wearoccurs and which embodies means for holding the bucket level, orsubstantially so, when it is lowered and is being thrust into a load. .Afurther object is to provide bucket latching means of novel andadvantageous construction for unlatching the bucket to dump its contentsfrom its elevated and tilted positions, and which latch mechanism is soarranged as to, be undisturbed by tilting of the bucket so thatthebucket will under no circumstances be accidentallyunlatched.

' These and other more detailedand specific objects will be disclosed inthe course of the following specification, referencebeing had to theaccompanying drawings, in which- Fig. 1 is a side elevation, partiallybroken away andin vertical section showing one form of my presentinvention, and showing the bucket" in dumping position. n

Fig. 2 is a partial plan view of the load carrier assembly shown in Fig.1, with certain parts of the loader tower or frame .shown in horizontalsection.

Fig. 3 is a side elevation similar to Fig..1 but showing the bucket inits tilted transportv position.

frame 2| comprising side plates 22 slidably sup- Fig. 4 is an enlargedfragmentary detail vertical sectional view taken substantially along theline 3--4 in Fig. 2.

Fig. 5 is a front elevation, showing the carrier mechanism in sectionalong the line 5-5 in Fig. 1.

Fig. 6 is an enlarged fragmentary detail sectional viewalong the line6-6 in Fig. 4.

Fig. is a plan view of a modified form of car-. rier mounting, a part ofthe bucket'and other parts of the structure being broken away.

Fig. 8 is a vertical sectional view along the line 3-8 inFig.7. I, v

Fig. 9 is a similar view along theline 9-9 in Fig. 7, but showing thebucket in tilted position.

Fig. 10 is a fragmentary detail sectional view illustrating theoperation.

The loader itself will be first described and it is, of course,understood that this loader is identical in all essential respects tothat shown in my previously identified. prior application and onlysuchparts thereof as essential to an understanding of my presentinvention will be described herein.

Referring now more particularly and by reference characters tothedrawing, the loader comprises an upright tower I I supported at thefront I end of a tractor I2 or other suitable automotive vehicle. Thetower I I comprises an inner rigidly supported frame I3 and an outervertically movable frame I4 the sides of which are slidablewith respectto the corresponding sides .of the inner frame. The outer frame I4 israised and lowered bymeans of cables Iisecured at I6 to the inner frame,trained over pulleys IT .on plungers I 8, and secured at their otherends I9,to the lower end of the outer frame. The plungers I8 are,vertically positioned by hydraulic fluid pressure-in cylinders 20supported in the inner frame It and it will be readily evident thatupward movement of the plungers will elevate the outer frame I4, andvice versa. Fluid under pressure is supplied to the cylinders 20 by asuitable pump and control system (not shown) powered by the tractorengine and under control of. the operator.

The loader assembly further includes a carrier ported alongside thesides of the outer tower frame I4 for up and down movements both with,and with respect thereto. These side plates 22 are rigidly joined byupper and lower cross bars 23 and 24 having forwardly turned flangesapertured near their ends to receive. vertical andremovablefasteningpins 25. The carrier frameZIris raised and lowered, as thetower frame. l l'corresponm ingly moves, by means of cables 26 whicharesuch that. from a lowered collapsed position at which the frames 13 andM are at substantially 1 the same level and the carrier frame down 7 peredges of the side plates 49. be released by a trip rope 52 (Fig. 3)connected near the ground, the upward movement powered by thecylinderszll will both project the outer;

tower frame M upwardly and elevate the carrier frame to the top thereofso thatianverwhighlift will be obtained. At the same time, in thecollapsed position the loader requires butcompa'ratively little headroom.

The" cross bars 23" and 24 and-removable-pins 25" provideconvenientmeans for mounting'ordismounting any particular loadihandlingorcarrying' device.- As here shown-thisdevice takes the form-of a"material bucket or scoop and for connecting this'buck'ea or 'othersimilar-device; to the carrierframe 1 21* I provide a' novel-mechanism'forming the-"subject matter of this invention;

This mechanism -as shown in Figs; 1 through 6; comprises'a first ormounting frame designated generally at 3i which is mounted on thecarrier frame-2|; and a-seco'nd-or tiltingframe designatedrgenerally at3 2 which' supports the bucket 30 andistiltably'supported'on said firstframed i.

The first or mQunting'frame-SI comprises' rear upright angles ormounting members 33 which are-rigidly-' joinedby upper and lower crossbars 34"and35 adapted to'fit between the aforesaid cross bars 23 and 24of the carrier frame 2i; These cross bars 34 and '35" are also aperturedto pass the-pins 25 and it will'be apparent that the frame 3! may thusbe readily attached to or detached from theloaderz The frame 31 furthercom'prises transversely spaced-aridforwardly projecting side plates 36the-rear edges ofwhich are outwardlyturn'ed" at 31 to fit? the outwardlyturned webs ofthe angles 33; Bolts-38 connect these parts'andbetweenthem aremountediaseries of 'shims 39: Bydncreasing or. decreasing thenumber "of these shims liflt the-i plates 36 and all parts attachedthereto" may be moved forwardly or."rearwardlyv with: respect to. theouter tower frame M. The. purpose of .suchadjustment will belater'pointed'out.

The second or" tilting; frame 32: comprises side plates 40! which" are:pivotally' mounted by pins or bolts: diet upper medial points toupperforward: corners of the side platesat'ihl The side plates; 40 are Ilocatedinwardly of, and. parallel to, the side-plates 3B and project" atlower corner portionss'forwardly' ofithe'plates alongside the bucket30': These forward"portionsof" the side plates are pivotallya'attach'edtat'4Q to opposite sides: ofithezbucket Sillandzthese: pivots; 42 are solocated: that". the bucket will'zln'orma'llypf "its ownweighttilt'forwardly aml'downwan'dly 'to'a dumptingi'positi'on" (Fig:1'); Snchgdumping movement is llIIlllIBd" by. stops: one of whicl'i't isshown. at i 43 andzwhich' contact. the r lower edges" of :the plates4fli-aasw-illzberclearlyapparentzg l To: normally hold: the; bucket;Ella, against such dumping moyements-l provide latchesidfiesecurednear-r oppositeends: of a latch: shaft: 45:: 'WhiChlS journaledtransversely-l betweem anew-through I brackets 46 welded or otherwisesuitably secured to the side plates 49. The latches are further sopositioned that the project forwardly alongside upper lateral corners ofthe bucket, when it is in normal position, and these forward ends of thelatches releasably engage latch pins 4'! laterally projecting from thebucket. The latches 44 are notched at 48 for this purpose and they arenormally, urged upwardly to maintain engagemerit urithfithe pins byspn'ngs 49 stretched between arms 50 on the latches and lugs 5! on up-The latches may to'ii ram arm'53 on the latch shaft 45 and a pull.onithis. rope will swing the latches down to clear thepins and allowthe bucket to tilt forwardly totdumpingq-positionz On restoring thebucket to normaliposition the pins ll ride up on nose surfaces 54on thelatches to depress them as necessary for reengaging the pins and thelatches are-held'in properposition for this camming action -by stops551ocatedin the path of the arms The rear ends of the side plates 4!extend to- Ward-but terminate some distance forwardly of the forwardsides of the movable fame i l, and these ends are rigidly joined by across member in the iormbfa tube 58 welded or otherwise secured tothe'plates and rigidly trussed as indioatedat 5-72 The rearends of'theside plates 43, and of course'the tube 56- are normally pulled upwardlyabout: the pivots 4! by a strong retractile-coilspring Bil-located abovethe upper cross-bai 34. One end of this spring 58 is adjustab'lyattached by an eye bolt 59 (Fig. 5) to a bracke-Ffill'uponthe cross bar3 1 while the other end-ofthe spring is hooked at iii to the lower armof a bell crank 62 pivotally mounted at 63 upon a--bracket64 alsosecured to said cross bar. A link 65 is'connect'ed at 66 to the otherarm of the bell crank 62 and depends therefrom at its lower'endforwardly of the tube 56 to a hook 87 secured tothe tube and upon whichthe link is hooked. The spring 58' thus tends to so swing the bell crank'62 as to pull'the link 65 upwardly and this motion is transmitted tothe tube 56 and plates '40 to elevate their rear ends, and of coursetends to lower-the bucketpivots 42. Such spring biased movement ofthe-parts is limited by stop screws lili which depend from the uppercross bar'fl into the path of? the tube 56 and these screws areadjustableras clearly indicated'in Fig. 4'at fi9=soi=thattthe normallevel of the parts, including bucket 30, may be readily adjusted.

As initheiloader 'shownin my prior application the movablertoweriframehas upright guide bars 101 or means-forming: upright guide surfaces, oneach forward surface and these bars are tapered offw'or'rearwardly-anddownwardly angled at lower ends'asi indicated at H. Above these ends theforwardsurfacesofv the bars ill project forwardly some distance-from thesides of the frame I 4. Cooperating with said guide bars are rollers 12which are arrangedrea-rwardly of the tube 56 and supported-therefrom byrigidly afiixed bearing brackets'l'3; The rollers 72 are so spacedthata'they 'willcontact the guide bars '50 as the carriers-frame 2lmovesupwardly, the bars terminating at such height above the lower ends ofthe frame Hl that the rollers will only reach thebars after-the buckethas been elevated some distancesabove'fits lowermost loading position.

In its normal or leading position the bucket 30standmwith'.itszrearupper corner portions immediatelyforward: ofa stop.screws 74- adjustably Means mounted in lugs I rigidly secured to thebrackets 45. Said screws extend forwardly from the brackets and inposition to engage the rear of the bucket and prevent it from tiltingback as might otherwise occur when the bucket is being thrust into aload or pile of material.

In operation as the carrier frame 2i is elevated to a certain point therollers 12 will contact the angular lower ends ll of the guide bars I0.It being understood that prior to this time the rollers I2 just clearthe forward surfaces of the frame I4 it will then be apparent that therollers in contacting the ends 1| will be forced to roll up over andalong the forward edges of the bars I0 as the carrier continues to rise,and in doing so the rollers will of necessity be moved both downwardlyand forwardly. This motion, transmitted through the brackets I3 and tube56 to the rear ends of the side plates tilts the entire frame 32downwardly to a considerable degree at its rear end. As a result theforward ends of the side plates 40, carrying the bucket pivots 42 areforced upwardly and forwardly tilting the bucket 30 upwardly at itsforward edge so that material therein will not spill over this edge asit is raised and transported from place to place. It will be noted thatthe latch mechanism for the bracket is in no way disturbed by thistilting action and that the bucket may be unlatched for dumping itscontents at any time. The bucket, of course, returns to normal levelposition when it is lowcred and the rollers I2 move downwardly off theguide bars III, the spring 58 bringing this about, and the whole actionis entirely automatic.

Varying the number and thickness of the shims 39 has the effect ofmoving the rollers I2 forwardly or rearwardly both to initiallydetermine the degree to which the bucket is tilted to compensate for theeffects of wear after long use.

The action of the guide bars I0 in forcing the if-lio rollers I2 bothdownwardly and forwardly, together with the effective leverages betweenthe rollers and the pivot points 4I and 42 results in the bucket beingtilted to quite a sharp angle as compared to the tilt possible in themechanism of my prior application, and this added tilt is found to be ofconsiderable advantage in preventing spillage of loose material from thebucket.

The mechanism shown in Figs. 7-10 is similar to that just described butis possibly more satisfactory in a heavy duty loader. The loader itselfremains the same and such parts thereof as appear in these views aregiven the same reference characters, while the bucket', differing onlyas to size, is again designated at '30. The guide bars 10 and angularlower ends II; are also identical and are so indicated.

Like the first described construction this modification includes a firstor mounting frame, here indicated generally at IS, and a fsecond ortilting frame indicated at H. Said first frame'comprises rear uprightangles or mounting-members I8 rigidly joined by upper and lower crossbars I9 and 80 adapted to be positioned between the cross bars 23 and 24of the carrier frame 2i and removably attached thereto "by the pins 25.The frame "I6 further comprises forwardly extending parallel side platesIll and at rear ends these are outwardly flanged andsecured by bolts 82to the angles I8. Shims 83 are again provideo. and for exactly the samepurpose.

The tilting frame 11 includes side bars '01' plates 84 located inwardlyof parallel to the sideplates 8| and, as in thej'p'reviousconstructiomthese plates 84 are pivotally attached, as by 6 pin's'orbolts 85, to the forward upward corners ofthe side plates of themounting frame. And herealso tilting of the frame TI is causedto tiltthe bucket 30 but in this case the bucket is pivotally attached at 86 tolower forward corners of the side plates 8|. This pivot is, however, asin the first modification of my invention, located forwardly of andbelow the pivot connection between the two frames and is so located withrespect to the center of gravity of the bucket that it will normally andof its own weight tilt toward dumping position.

The rear ends of the side plates 84 terminate forwardly of the movabletower frame I4 some distance and they are rigidly joined by a trussedcross member or tube 81 from which rearwardly extend bearing brackets 88carrying rollers 89 in position to engage the guide bars Ill. The rearends of the side plates 84 are also upwardly biased, until such motionis limited by stop screws 90 carried by the upper cross bar I9 aspreviously described, by a strong coil spring SI again arranged abovethe said cross bar I9 and attached at one end to a bracket 92 and at itsother end to a bell crank 93 carried by another bracket 94. A link 95connects the bell crank 93 to the tube 81 to pull the same upwardly and.when the tube is against the stop 90 it is, of course, understood thatthe 'bucket30 is held substantially level as it is shown in Fig. 8.

Bucket latch mechanism is arranged between the frame I1 and the bucketand comprises brackets 96 secured to upper edges of the side plates 84rearwardly of the bucket and supporting a transversely journaled shaft91. Latches 98 are secured to this'shaft 91 and depend downwardly andforwardly therefrom to points adjacent transversely positioned latchpins 99 secured by brackets I00 to the rear of the bucket. The latches98 are forwardly and downwardly notched, as at I0l, to-engage over thepins 99 and when so engaged will obviously hold the bucket from dumpingwhile looking it to the tilting frame TI. The latches are normally urgedforwardly at lower ends to maintain and returnto latching engagementwith the pins 99 by springs I02 stretched between arms I03, affixed tothe ends of the shaft 91, and lugs I 04 upon the upper edges of the sideplates 84.

Between the brackets 96 a sleeve I05 is journaled upon the shaft 91 andthis sleeve is provided with a lever arm I08 to which the trip rope (notshown) is attached, the arm extending rearwardly as clearly shown. Theweight of the arm I06 tends to cause the sleeve I05 to turncounterclockwise upon the shaft as it is viewed in the drawing and thisaction tends to normally are reduced in width to form fingers I I I vwhich normally stand immediately behind the inside of the latches.

The foregoing arrangement is such that oscillation of the sleeve I05 bya pull on the trip rope will swing the upper togglearms I0'I rearpins 99wardly at their lower ends imparting to the fingers III an oppositeforward movement.

The fingers in so moving crowd the latches 98 out of engagement with thepins 99 to allow the bucket tordump sand the leverage obtained by thetoggle action is such .as to release the latches against.thel'relatively tremendous loadof a large bucket, without -difficulty.

To prevent the bucket from tilting backward :at its upper rear edge whenbeing thrust into a mile I again provide stop .means in this casecomprising swingablestop arms Hdpivoted at H3 at rear ends to brackets414 secured atop the upper cross bar '59. The arms H2 normally .exztend:forwardly from these pivots "to points immediately behind the upperrearcorner portions of the bucket (Fig. 8) and carry adjustable rstop:screws ii to to contact the bucket :and prevent its :sotilting. AnglesH6 are secured to-the bucket 'and have rearward-ly overhangingwebs -l Hwhich will :prevent the stop arm 1 1'2 from kicking up at forward ends.I 1

.The arms H2 are held up in position when the 'bucket is level byoperating screws-or dogs M8 attached by brackets H9 to the tube 81 inposition to upwardly engage the arms forwardly :of'theirpivots 1 !3. Inorder to allow the'bucket tilt to transport position {as in Fig. 9-the.stop arms M2 must obviously swing downwardly to clear and this 'they"do since, as the bucket is tilted, the :tube 81 moves downwardly :andthe dogs 1 [8 allow 'the arms to reach almost a verztically hangingposition. When the bucket is again leveled the dogs will, of :course,reengage the stop arms :and :restore them to the position :oflFig. 8.

The operation of this mechanism is similar to "that previously "set .outaudit will be appar- -ent that, as the carrier rises the engagementofthe rollers-S9 with the guide bars 10 will-swing the "rear 'ends ofthe side plates "84 downwardly. This .motion is transmitted through 'thelatches :98 to the bucket T30 along lines eccentric "to the pivots :86so that the'bucket is tilted sharply :up- :ward at its-forward edge asseen in Fig. 9. .As the carrier descends the bucket will of course ibeleveled again by action of the spring 9!.

.It :is understood that suitable modifications may be made in thestructure :as disclosedprowided such modifications come within the:spirit candscopezof the appended claims.

Having now therefore fully illustrated and described my invention, .what.I claim :to be new and desire to protect by Letters Patent is:

1. In a :loader having an upright :guide .-:surface and a carrier fframemovable upwardly and downwardly with respect thereto, a first frame.:rigidly supported by said carrier frame, a second comprising side:Plates -.connect.edby across member. a. bucket :tiltably supported withrespect to said second frame, and means located between said acrossmember and the pivotal connection between :the ,first and second framesand normally locking the bucket to said second frame fortilting-movements therewith. i

4. In a loaderhaving an upright guide member, '23; first'framenon-tiltably supported for up and down movements along said guidemember, a :second .frame tiltably supported on the first .frameiandihavingside portions connected ;by a rigidly mountedcross member, meanscarried by :saidlcross :member for engagement with the said guide memberto tilt the second frame as the irames move up and down, and a loadcarrying device connected to and tiltable with said second frame. i

:5. In a loaderhaving an upright loader frame "and a guide member on aforward side thereof, a {carrier -.frame movable upwardly and downwardlyalong-said-loader frame, a first frame supported from said carrierframe, a second :frame vpivotally supported on the first frame :at apoint forwardly of the-loader and carrier frames, means carried by therear .end. of the second framefor engaging said guide member to tilt theframe, a load carrier :device connected to and tiltablewith said-second"frame, and said engaging means being spaced vrearwardly in asubstantially horizontal plane. from -the pivot connection between thesaid first and second frames. i

6. In :a;,-loader' having .an upright loader frame and a guide member.on .a forward side :thereof, a carrier .frame movable upwardly and.downavardly along said loader frame, a first frame supported from saidcarrier frame, a second frame :pivotally supportedon the first frame-at=a point forwardly of the loader and carrier frames, rmeans carriedrbythe rear end of the "second-frame for.=engaging said guidexmember'totilt the frame,- a load carrier device 'pivotally supported for tiltingmovements'independently rotsaid second frame; latch .means normallylockiingsaid load carrier device to said .second'irame, .and said latchmeans being located rearwardly of the :pivot connection betweensaid-firstuand second frames.

7.. Inaa loader of the character described ha-vinganupright guide memberand a carrier movable wupwardly and downwardly with respect thereto, :asupporting and tilting mechanism for a 'loadrhandling'device comprisingin combinaframe tiltably supported on said first frame :for ,tion,azfirst frame supported on said carrier, a

downward swinging movements at one end; :a :tubular cross member on saidsecond :irame, :meansiparriedsby said cross memberforengagemerit 1 bysaid guide surf ace :as the :frames ,move upwardly and operativetherebrtontilt saidsec- --ond .frame, and a .load carrier operativelycon- :nected :to and tiltable with-said second'frame.

"2.:In a loader of the character described, :a ifirst frame supportedfor up and-down movements, a "second :frame pivotally supported :onthe-ifirstiframe:for-tilting movements asrthe first .Lframe moves up anddown,said second frame comprising side plates connected by a crossmemiber and a bucket connected to and :tiltable with :said secondfframe.

13. In ;a leader of the character described. -a first frame supported.for up and down move- 2111911135,.2n5'880l'1d frame,pivotallyshDDOrted-on the first frame for tilting movements :gas :theafirst seccnd=frame vpivotally supported on thefirst frame and pivotallysupporting the said device, means -.carried by the secondiramecooperating :with the guide member-to tilt the frame and load handlingdevice as a unit,- and latch means located between-said means and thepivot connection between the first and-second frames for lockingthezload-handling device .with respect to saidsecond frame. i

8. :In'a-loader having an upright frame,=a guide :rnemberon the forwardside of the frame, and :a .materi-aL-bucket, mechanism -for supportingand tilting the bucket, comprising combination, .acarrierframemountedfor up and down movements with respectto. said guide member, :amountingirame (on the carrier frame, side plates pivoted ib'etween theirends to said .mounting -.fr.ame.; and having forward ends supportablyconnected-to thebucket, means rigidly normed;-

firame moves up and down, said-second :sframe T5 the tea'r-endszofitheside plates, and rollers carried by said connecting means andcooperating with the guide member to tilt the side plates and bucket.

9. In a loader having an upright frame, a guide member on the forwardside of the frame, and a material bucket, mechanism for supporting andtilting the bucket, comprising in combination, a frame mounted for upand down movements with respect to said guide member, side platespivoted between their ends to said frame and having forward endssupportably connected to the bucket, means carried by the rear ends ofthe side plates and cooperating with the said guide members to swingsaid rear ends downwardly as the bucket is raised, and spring meansnormally biasing the rear ends of said side plates in an upwarddirection.

10. In a loader having an upright frame, a uide member on the forwardside of the frame,

and a material bucket, mechanism for supporting l and tilting thebucket, comprising in combina tion, a frame mounted for up and downmovements with respect to said guide member, side plates pivoted betweentheir ends to said frame and having forward ends supportably connectedto the bucket, means carried by the rear ends of the side plates andcooperating with the said guide member to swing said rear endsdownwardly as the bucket is raised to thereby tilt the bucket upwardlyat its forward edge, and spring means carried by said movable frame andconnected to the said side plates to normally and yieldably urge them inan upward direction.

11. In a loader having an upright frame, a guide member on the forwardside of the frame, and a material bucket, mechanism for supporting andtilting the bucket, comprising in combination, a frame mounted for upand down movements with respect to said guide membeigside plates pivotedbetween their ends to said'frame and having their forward ends pivotallyconnected to the bucket, latch means carried by the side plates andnormally locking the bucket against downward dumping movements at itsforward edge, stop means preventing opposite swinging movements of thebucket with respect to the side plates, and means carried by the sideplates for engaging the said guide member to tilt the side plates andbucket as a unit.

12. In a loader having an upright frame, a guide member on the forwardside of the frame, and a material bucket, mechanism for supporting andtilting the bucket, comprising in combination, a frame mounted for upand down movements with respect to said guide member, side platespivoted between their ends to said frame and having forward endssupportably connected to the bucket, means carried by the rear ends ofthe side plates and cooperating with the said guide members to swingsaid rear ends downwardly as the bucket is raised, and'spring meansnormally biasing the rear ends of said side plates in an upwarddirection, the said spring means including a bell crank biased in onedirection by the spring and connected to said side plates.

13. In a loader having an upright frame, a guide member thereon, and amaterial bucket, mechanism for supporting the bucket comprising amounting frame supported for up and down movements with respect to saidupright frame,

side bars pivotally attached at forward ends to said mounting frame andhaving means at their rear ends cooperating with the guide member toswing the bars downwardly as the mounting frame moves upwardly, the saidbucket being pivotally supported upon said mounting frame,

.and means connected between the said bars and the bucket fortranslating said downward movement of the bars to upward tiltingmovement of the forward edge of the bucket.

14. In a loader having an upright frame, a guide member thereon, and amaterial bucket, mechanism for supporting the bucket comprising a;mounting frame supported for up and down movements with respect to saidupright frame, side bars pivotally attached at forward ends to saidmounting frame and having means at their rear ends cooperating with theguide member to swing the bars downwardly as the mounting frame movesupwardly, the said bucket being pivot-ally supported upon said mountingframe, latch means normally engaging the bucket to prevent dumpingmovement thereof, and said latch means being normally connectedbetweenthe side bars and the bucket to tilt the bucketupwardly at itsforward edge responsive to said downward movement of the side bars.

15. In a loader having an upright frame, a guide member thereon, and amaterial bucket, mechanism for supporting the bucket comprising amounting frame supported for up and down movements with respect to saidupright frame, side bars pivotally attached at forward ends to saidmounting frame and having means at their rear ends cooperating with theguide member to swing the bars downwardly as the mounting frame movesupwardly, the said bucket being pivotallysupported upon said mountingframe, means connected between the said bars and the bucket fortranslating said downward movement of the bars to upward tiltingmovement of the forward edge of the bucket, and stop means normallylocated in position to prevent said tilting movement of the bucket butmovable to inopera tive position responsive to said dowward move ment ofthe side bars.

16. In a loader having an upright frame, a guide member thereon, and amaterial bucket, mechanism for supporting the bucket comprising amounting frame supported for up and down movements with respect to saidupright frame, side bars pivotally attached at forward ends to saidmounting frame and having means at their rear ends cooperating with theguide member to swing the bars downwardly as the mounting frame movesupwardly, the said bucket being pivotally supported upon said mountingframe, means connected between the said bars and the bucket fortranslating said downward movement of the bars to upward tiltingmovement of the forward edge of the bucket, stop arms swingablysupported and normally located in position to engage the rear of thebucket and prevent said tilting movement thereof, and means carried bythe side bars normally upwardly engaging said stop arms but adapted tomove downward as the bars move downward and thereby enable the arms toswing downward and clear the bucket.

17. In a loader having a frame and a bucket tiltably mounted for upwardmovement at its rear end to dump its contents, a latch mechanismcomprising a swingably supported latch member notched at one end, a pincarried by the bucket for engagement with said notch, and a togglemechanism for releasing the latch comprising a first arm and a secondarm pivotally connected, the second arm being fulcrumed on the latch andadapted at its end to bear against the pin to crowd the latch out ofengagement therewith,

I 1 responsive to swinging movement ofthe first arm, and means forswinging saidfirst arm.

18. In a loader having an upright frame; a guide member and a materialbucket, mechanism for supporting the bucket comprising in'combination, amounting frame operatively supported for up and down movements on saidupright frame, side members having end portions turned toward said guidemember, said side members being pivotally supported on the mountin frameand having means on their said end portions cooperating with the guidemember to swing the side members in an upright plane as the mountingframe moves upwardly, the said bucket being pivotally supported on saidmounting frame, latch means operative to hold the bucket against pivotalmovements, and said latch means being normally operative to connect theside members to the bucket in such manner as to swing the forward edgeof the bucket upwardly responsive to said swinging movement of the sidemembers.

19. In a loader having a frame and a material bucket pivotally supportedon the frame for upward tilting movements at its forward edge, mechanismoperative to tilt the bucket, a swingably supported stop arm normallypositioned to engage the rear of the bucket and prevent such tiltingmovement, and means operative by said tilting mechanism to swing saidstop arm to a position at which it will clear the bucket as it is tiltedby said mechanism.

20. In a loader having a frame and a material bucket pivotally supportedon the frame for upward tilting movements at its forward edge, mechanismoperative to tilt the bucket, a swingably supported stop arm normallypositioned to engage the rear of the bucket and prevent such tiltingmovement, means-operative by said tilting mechanism to swing said stoparmd'ownwardly to clear the bucket as it is tilted by said mechanism,and means for limiting the stop arm movement in an upward directionso'tli'at it cannot kick-up clear of the bucket.

21. In a loader of the character described; a first frame operativelysupported for up and down movements, 9. second frame pivotally supportedon said first framameansfor tilting the second frame as the first frametravels, a bucket supported on said frames in such manner as to betilted from a normal position when the second frame is tilted, and anadjustable stop member carried by the first frame and downwardlyengaging the second frame for. leveling the bucket in its said normalposition. v

22. In a loader of the character describedhaving an upright guide memberand a carrier frame movable upwardly and downwardly with respectthereto, a bucket supporting frame structure secured to and projectingforwardly from said carrier frame, a material bucket tiltably supportedby said frame structure, means engageable rearwardly with said guidemember and operative to be moved forwardly thereby to tilt the bucket asit is raised, and adjusting shims removably mounted" between the carrierframe and the said framestructure whereby the frame structure and saidguide member engaging'means may be adjusted forwardly and rearwardlywith respect to said guide member.

23.- In a loader having a frame supported for up and down movements anda material handling bucket pivoted on the frame for up and down tiltingmovements at its material receiving edge, a latch normally locking thebucket in a level position, and a stop screw supported by the frame andengaging the back of the bucket to hold its material receiving edge fromtilting upwardly as'it is thrust into the material for loading.

24. In a loader of the character described, a first frame operativelysupported for up and down movements, 2. second frame pivotally supportedon said first frame, means for tilting the second frame as the firstframe travels, a bucket supported on said frames in such manner as to betilted from a normal position when the second frame is tilted, and astop screw threaded on the first frame and adjustablypositionable toengage the second frame for adjusting the said normal position of thebucket.

25; In a loader having a frame and a bucket tiltably mounted for upwardmovement at its rear end to dump its contents, a latch mechanismcomprising a swingably supported latch member notched at one end, a pincarried by the bucket for engagement with said notch, and mechanism forreleasing the latch comprising an arm mounted on the latch and manuallymovable against the pin to crowd it out of the notch and releasethe'bucket.

LE GRAND H. LULL.

REFERENCES CITED Ihe following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,301,102 Werthman et al Nov. 3,1942 2,375,337 Wilson May 8, 1945 2,386,519 Wagner et a1. Oct. 9, 19452,394,458 Lull Feb. 5, 1946 2,394,809 Ross Feb. 12, 1946 2,395,634Martin Feb. 26, 1946' 2,405,312 Mandt Aug. 6, I945 FOREIGN PATENTSNumber Country Date 329,460 Great Britain May 22, 1930'

